Wrench



ISLE- L June 30,' 1925. 1,544,000

P. w. GRADY WRENCH Filed may" 26 1924 IWI? I Patented June 30, 1925.

UNITED STATES PATENT Fries.

PETER W. GRADY, OF GRAND FORKS, NORTH DAKOTA, ASSIGNOR OF ONE-FOURTH TO CLARA, DONAHUE, OF SEATTLE, VVASI-INGTON.

WRENCH.

Appneation inea Mayes, 1924. serial no. 715,896.

To all whom it may concern."

Be it known that I, PETER W. Gianni'. a citizen of the United States, residing at Grand Forks, in the county of Grand Forks and State of North Dakota, have invented certain new and useful Improvements in llfrenches, of which the following is a specitication.

The present invention relates to wrenches especially pipe wrenches and has for an object the provision of a quickly adjustable jaw'which may be moved vwith convenience and facility to adjust the wrench for the accommodation of different sizes of work, at the same time providing a durable wrench which effectively grips the work in correspondence with the pressure applied thereto.

Another object of the invention is to provide a wrench of simple and inexpensive construction which is somewhat flexible to especially adapt the same for use on difficult work and under diiiicult conditions, one of the jaws therof being bodily movable on a fulcruni to obtain a positive and effective purchase on the work eliminating the possi bility of the jaws slipping.

Other objects of the invention will be apparent from the following description of the present preferred form of the invention taken in connection with theaccompanying drawings wherein Fig'. 1 is an elevational view of a wrench constructed in accordance withthe present invention 5 Fig. 2 is a similar view showing a part of the frame and a part of the stationary jaw broken away to Adisclose details;

Fig. 3 is across sectional view of the wrench taken on the line 3-3 of Fig. 1 and looking` in the direction of the arrow;

Fig. 4t is a detail fragmentary side elevational view of a slightly modified form of the invention.

The wrench constituting the present 'invention consists especially of a loop frame Ll which in the present instance is shown to be of rectangular configuration and has linedly mounted therein a jaw 5 which constitutes the inner aw of the wrench. A jaw 6 is floatingly mounted in the frame 4 and constitutes the outer aw of the wrench. It will be notedthat the working` ends of the jaws 5 and 6 are curved and have the inner faces therof equipped with teeth 7 which are adapted f-or'engagement with the pipe or other work to be gripped between the jaws.

The jaws 5 and 6 are of substantially the same length the latter being' slidable through the frame t in an apparent manner and also being relatively movable with respect to the inner aw 5 by means of a handle 8. The outer marginal edge of the ou'ter jaw 6 is impinged by a rib 9 which is formed on the inner face of one of the end walls of the frame 4 near the lower margin of the latter as shown in 2. Consequently, the jaw 6 may he rocked on the rib 9, the latter serving as a fulcrum when the lower end of the jaw 6 is moved. Movement of the lower end of the jaw 5 is accomplished by the handle 8 the inner end of which latter has a cam head 10 formed thereon which is pivoted to the inner end of the wrench 6. The curved face of the head 10 is engageable with the inner margin of the stationary jaw 5 so that pressure upon the handle 8 will urge the lower end of the aw 6 outwardly to correspondingly move the outer end of the jaw 6 toward the outer end of the jaw in an obvious manner.

Normally the jaws 5 and 6 are held in spaced relation by a coil spring 11 one end of the latter being` mounted in a recess 12 formed inthe inner face of the inner jaw 5 while. the opposite end engages a socket 1S formed in a guard plate 14e. llChe socket 13 is slidable over serrations 15 formed on the inner face of the outer jawzG. The spring 12 likewise normally holds the outer jaw 6 in intimate contact with the rib 9. The guard plate 14 is slidably mounted on a detachable post 16 mounted in the jaw and is likewise slidably engaged with alocking element 17 which is also detachably mounted in the inner jaw 5. The. locking element 17 in the present instance consists of a cylin drical body the outer end of which is formed to provide a tooth 18 which is engageable in any one of the notches between the serrations 15. Consequently, when the lower end of the jaw 6 is moved outwardly so as to urge the outer end thereof toward the inner jaw 5, the tootlrlS of the locking` member 17 will engage one of the recesses or notches between the serrations 15 thereby positively holding the outer jaw 6 from movement.

In use of this device it will be apparent that when pressure of the cam head 10 is retoward the stationary jaw 5 which causes the cam head 10 to impinge the stationary jaw thereby orcinglthe inner end of the mov- P able jaw 6 outwardly and the outer end ot said jaw inwardly in an apparent manner. This cycle of movement reengages the tooth 18 with the serrations 15 in an apparent manner. When said tooth is engaged with the serrations the movable jaw 6 is locked thereby positively gripping the work between the jaws vand preventing slipping ot transmitted through the cam head 10 to the fixed jaw 5.

j If desired an abutment 19 may be slidably mounted on the the jaw 5 ,in order to hold the jaws 5 and 6 in a predetermined position after the lever 8 has urged the j awy 6 into engagement with the work. In this way, the working ends of the jaws 5 and G may be held in fixed engagement with the work without the necessity of holding the handle 8. The inner 'face of the abutment 19 is beveled to provide a tooth 2O which is adapted to bite into the inner face of the jaw 6; The abutment 19, when not in use, is arranged in close proximity to the iframe a and in View of the factthat the inner face thereof is beveled, the movable body 6 may be urged through the frame without Contact with the abutment. lVhen the jaws have been engaged with the work andV it-desired to hold said jaws iiXed the abutment is then moved on the shank of the jaw 5 away from the :trame 4 untilthe tooth 2() of the abutment engages the inner face of the movable jaw 6.

The above description embodies the essential features of construction and operation of this invention but it is to be understood that various changes may be made in this device especially in the details of construction, proportion and arrangement of parts within the scope of the claims hereto ap j ended.

lVha't is claimed is.:-

1. A wrench including a 'tubular frame equipped with jaws mounted therein one of which is movable and the other stationary, a rib formed on the inner face of one of thewalls ot the frame, a spring normally forcing said movable jaw against the. rib, and a handle pivotally mounted on said movable jaw and enga-geable with the stationary aw to rock the movable jaw on said rib against the resistance of the spring.l

2. A wrench including a frame, a pairrot' jaws mounted in said frame one of which `is movable in andthe other fixed to the frame, a spring to normally hold the movable jaw spaced from the stationaryjaw, a handle to urge the working end of the movable jaw toward the working end ofthe stationary jaw, and a tooth carried by the stationary jaw and engageable with the movable jaw to lock the latter from sliding movement in the traine. i

3. A wrench including a iframe7 a pair of .jaws mountedin the frame one'of which is movable, means mounted in said frame to hold the sliding jaw spaced from the other jaw, a rib mounted in said frame and engageable with said sliding jaw, a handle for rocking said sliding jaw on said rib against theV resistance of said means, and atooth de tachably mounted in said stationary jaw and engageable with the movable jaw when the latter is; rocked on said rib to hold the movable jaw from sliding action.

In testimony whereof I aHiX my seal.

' PETER W. GRADY. 

